/Engine/Source/Runtime/Engine/Classes/Engine/AssetManagerTypes.h
Information about a package chunk, computed by the asset manager or read out of the cooked asset registry
struct FAssetManagerChunkInfo
TSet<FAssetIde...
AllAssets
All packages/Primary Assets in a chunk, includes everything in Explicit plus recursively added ones
TSet<FAssetIde...
ExplicitAssets
Packages/PrimaryAssets that were explicitly added to a chunk